Cardiac Anatomy

left atrium Left atrial appendage Left ventricle anterior wall Mitral valve Papillary muscles Left ventricle inferior wall

mitral valve Pulmonary valve Right atrial appendage Infundibulum Anterior leaflet Posterior leaflet Infundibulum Tricuspid valve

left ventricle outflow tract Sinotubular junction R Sinuses of Valsalva N L Ascending aorta Sinotubular junction Sinuses of Valsalva

aortic valve Right ventricle outflow tract Right coronary cusp Right atrium Noncoronary cusp Left coronary cusp Left atrium

papillary muscles Right ventricle outflow tract Right ventricle A A Anterolateral Right ventricle outflow tract Right ventricle A Posteromedial A Trabeculations P Interventricular septum P

chordae tendinae Papillary muscles Mitral valve

left ventricular walls Anterior wall Septal wall Lateral wall Inferior wall

right atrial appendage has a wide origin and a broad and triangular appearance. Left atrial appendage has a narrower origin and a tubular shape Right ventricle outflow tract Superior caval vein Left atrial appendage Pulmonary veins

crista terminalis The crista terminalis is a ridge in the right atrium that separates the two components of the right atrium, the sinus venosus (smooth muscles) and the atrium of the AV valve (pectinate muscles) Right ventricular free wall Apex Aortic valve Mitral valve Interatrial septum

coronary sinus Moderator band Right coronary artery Thebesian valve Posterior interventricular vein The Thebesian valve is a remnant of the right venous valve Thebesian valve Inferior caval vein CS

eustachian valve The Eustachian valve is a fibromuscular web that attached to the opening of the inferior caval vein Superior caval vein Tricuspid anterosuperior leaflet Tricuspid inferior leaflet Cavotricupid isthmus EV Inferior caval vein

right ventricular outflow tract Aortic valve Left atrium Mitral valve Right ventricular trabeculations Apex Crista supraventricularis

moderator band The moderator band is a muscular band that extends from the interventricular septum to the base of the anterior papillary muscle in the RV Chordae tendinae Pectinate muscles

Conal papillary muscle Anterior descending artery Right coronary artery Foramen oval The right ventricle contains anterior and posterior papillary muscles and a smaller conal papillary muscle The conal papillary muscle arises from the septal band of the interventricular septum Circumflex artery

right coronary artery Aortic root Left ventricle

conus artery Acute marginal branch Right coronary artery AMB PDA Acute marginal branch Right coronary artery The conus artery is the first branch of the right coronary artery in 50-60% of patients

posterior descending artery Circumflex artery The coronary artery that gives rise to the PDA and posterolateral branch is referred to as the dominant artery, with the RCA being dominant in approximately 70% of cases. Obtuse marginal branch Posterolateral artery

Anterior descending artery left coronary artery LCA LCx RI LAD Right coronary artery In 15% of patients, a third branch (ramus intermedius) arises at the division of the LCA, resulting in a trifurcation Circumflex artery Anterior descending artery

anterior descending artery

Anterior descending artery diagonal branches Anterior descending artery

Anterior descending artery septal branches Right coronary artery Anterior descending artery Left coronary artery

circumflex artery Left coronary artery LCA LAD

obtuse marginal branch LCA LCx The left circumflex artery courses in the left atrioventricular groove and gives off obtuse marginal branches to the lateral left ventricle LAD

sinoatrial nodal artery Right coronary artery The sinoatrial nodal artery arises from the RCA in approximately 58% of patients; in the remaining patients it arises from the left circumflex artery Left circumflex artery Ramus intermedius artery Left coronary artery Diagonal branches